<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>表格数据对比工具</title>
    <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>📊</text></svg>">
    <script src="https://cdn.tailwindcss.com/3.3.3"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">
    <script src="https://cdn.jsdelivr.net/npm/xlsx@0.18.5/dist/xlsx.full.min.js"></script>
    <!-- 新增：引入markdown解析库 -->
    <script src="https://cdn.jsdelivr.net/npm/markdown-it/dist/markdown-it.min.js"></script>
    <style>
        :root {
            --primary: #667eea;
            --primary-dark: #5a6fd8;
            --secondary: #764ba2;
            --light: #f8f9ff;
            --dark: #333;
            --gray: #6c757d;
            --success: #28a745;
            --danger: #dc3545;
            --warning: #ffc107;
            --info: #17a2b8;
            --border-radius: 16px;
            --box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: var(--dark);
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
            margin: 0; /* 添加：确保body无默认margin */
            padding: 20px; /* 添加：与container的padding呼应 */
        }

        /* 从文件清单导出工具复制的container样式 */
        .container {
            background: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 40px;
            max-width: 1000px;
            width: 100%;
            text-align: center;
            position: relative;
            overflow: hidden;
            animation: fadeIn 0.8s ease-out;
            backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.95);
            margin: 0 auto; /* 添加：居中显示 */
        }

        .container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 6px;
            background: linear-gradient(45deg, var(--primary), var(--secondary));
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        #particles-js {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 0;
        }

        .glassmorphism {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }

        .glassmorphism:hover {
            box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.25);
        }

        .card-hover {
            transition: var(--transition);
        }

        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 28px 0 rgba(31, 38, 135, 0.2);
        }

        .file-upload-area {
            border: 3px dashed #ddd;
            border-radius: var(--border-radius);
            padding: 50px 20px;
            margin-bottom: 30px;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            background: var(--light);
            backdrop-filter: blur(5px);
            pointer-events: auto;
        }

        .file-upload-area:hover, .file-upload-area.dragover {
            border-color: var(--primary);
            background: rgba(102, 126, 234, 0.08);
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }

        .file-upload-area.file-selected {
            border-color: var(--success);
            background-color: rgba(52, 211, 153, 0.08);
        }

        .file-upload-input {
            opacity: 0;
            position: absolute;
            width: 100%;
            height: 100%;
            cursor: pointer;
            z-index: 10;
        }

        .btn-primary {
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            padding: 18px 45px;
            border-radius: 30px;
            font-size: 18px;
            cursor: pointer;
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
            transition: var(--transition);
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }

        .btn-primary:hover:not(:disabled) {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(102, 126, 234, 0.5);
            background: linear-gradient(45deg, var(--primary-dark), var(--secondary));
        }

        .btn-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .export-option {
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            padding: 12px 15px;
            border-radius: 10px;
            border: 2px solid #eee;
        }

        .export-option:hover {
            background-color: rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
            border-color: rgba(102, 126, 234, 0.3);
        }

        .export-option input[type="checkbox"]:checked + label {
            color: var(--primary-dark);
            font-weight: 700;
        }

        .export-option input[type="checkbox"]:checked + label i {
            color: var(--primary-dark);
            transform: scale(1.1);
        }

        .export-option input[type="checkbox"]:checked ~ .export-option,
        .export-option:has(input[type="checkbox"]:checked) {
            border-color: var(--primary-dark);
            background-color: rgba(102, 126, 234, 0.15);
            box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.3);
        }

        .blob {
            position: absolute;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
            filter: blur(60px);
            border-radius: 50%;
            animation: blob-movement 15s infinite linear;
            z-index: -1;
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        @keyframes blob-movement {
            0% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(5%, -10%) scale(1.3); }
            66% { transform: translate(-15%, 5%) scale(0.9); }
            100% { transform: translate(0, 0) scale(1); }
        }

        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(102, 126, 234, 0.5);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(102, 126, 234, 0.7);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .file-upload-container {
                flex-direction: column;
            }
            
            .export-options {
                flex-wrap: wrap;
            }
            
            .export-option {
                flex: 0 0 calc(50% - 8px);
                margin-bottom: 12px;
            }
            
            .container {
                padding: 25px; /* 响应式调整container内边距 */
            }
        }

        /* 动画效果 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .fade-in {
            animation: fadeIn 0.5s ease forwards;
        }

        .feature-card {
            transition: var(--transition);
            border: 2px solid #e0e7ff; /* 新增：功能块边框 */
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px -5px rgba(102, 126, 234, 0.2);
            border-color: var(--primary); /* 新增： hover时边框变色 */
        }

        .feature-icon {
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1);
            color: var(--primary);
        }

        /* 加载动画 */
        .loader {
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top: 3px solid white;
            width: 24px;
            height: 24px;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* 状态提示样式 */
        .status-container {
            height: 35px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .status {
            width: 100%;
            color: white;
            padding: 12px 25px;
            border-radius: 25px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s ease-out;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 15px;
            position: absolute;
            top: 0;
            left: 0;
            transform: scale(0.9);
        }

        .status.show {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }

        .status.info {
            background-color: var(--info);
        }

        .status.success {
            background-color: var(--success);
        }

        .status.warning {
            background-color: var(--warning);
            color: #333;
        }

        .status.error {
            background-color: var(--danger);
        }

        /* 彩色图标样式 */
        .icon-same { color: #22c55e !important; } /* 绿色 */
        .icon-different { color: #ef4444 !important; } /* 红色 */
        .icon-a-unique { color: #3b82f6 !important; } /* 蓝色 */
        .icon-b-unique { color: #8b5cf6 !important; } /* 紫色 */
        .icon-union { color: #eab308 !important; } /* 黄色 */

        /* 完全复制的页脚样式 */
        .footer {
            margin-top: 10px;
            padding-top: 25px;
            border-top: 2px solid #eee;
            font-size: 15px;
            color: var(--gray);
            text-align: center;
        }

        .footer-content {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-info {
            display: flex;
            justify-content: center;
            gap: 25px;
            flex-wrap: wrap;
        }

        .footer-info div {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 15px;
            background: rgba(108, 117, 125, 0.08);
            border-radius: 20px;
            transition: var(--transition);
        }

        .footer-info div:hover {
            background: rgba(108, 117, 125, 0.15);
            transform: translateY(-2px);
        }

        .footer a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
            font-weight: 600;
        }

        .footer a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
    </style>
</head>
<body>
    <div class="particles" id="particles"></div>
    
    <!-- 背景blob -->
    <div class="blob w-96 h-96 top-0 left-0"></div>
    <div class="blob w-80 h-80 bottom-0 right-0"></div>

    <div class="container">
        <!-- 主内容区 -->
        <main class="relative z-10">
            <!-- 标题区域 -->
            <div class="text-center mb-12 fade-in" style="animation-delay: 0.1s;">
                <h1 class="text-4xl font-bold text-indigo-800 mb-4 flex items-center justify-center">
                    <i class="fas fa-table mr-3 text-indigo-600"></i>表格数据对比工具
                </h1>
                <p class="text-gray-800 max-w-2xl mx-auto">高效对比CSV、XLS、XLSX、TXT、MD文件内容，支持多种对比模式，快速导出结果</p>
                
                <!-- 状态提示容器 -->
                <div class="status-container">
                    <div class="status" id="status"></div>
                </div>
            </div>

            <!-- 功能亮点 -->
            <div class="grid grid-cols-1 md:grid-cols-3 gap-6 mb-12">
                <div class="glassmorphism p-6 text-center feature-card fade-in" style="animation-delay: 0.2s;">
                    <div class="feature-icon text-3xl text-indigo-600 mb-4">
                        <i class="fas fa-file-export"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-2">多格式支持</h3>
                    <p class="text-gray-600">支持CSV、XLS、XLSX、TXT、MD格式，无需转换直接对比</p>
                </div>
                
                <div class="glassmorphism p-6 text-center feature-card fade-in" style="animation-delay: 0.3s;">
                    <div class="feature-icon text-3xl text-indigo-600 mb-4">
                        <i class="fas fa-balance-scale"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-2">智能对比</h3>
                    <p class="text-gray-600">灵活选择对比列，精确识别相同值、不同值和唯一值</p>
                </div>
                
                <div class="glassmorphism p-6 text-center feature-card fade-in" style="animation-delay: 0.4s;">
                    <div class="feature-icon text-3xl text-indigo-600 mb-4">
                        <i class="fas fa-download"></i>
                    </div>
                    <h3 class="text-xl font-semibold mb-2">快速导出</h3>
                    <p class="text-gray-600">导出带时间戳的表格结果，支持多种导出类型组合</p>
                </div>
            </div>

            <!-- 文件上传区域 -->
            <div class="glassmorphism p-8 mb-8 fade-in" style="animation-delay: 0.5s;">
                <h2 class="text-2xl font-semibold mb-6 text-gray-800 flex items-center">
                    <i class="fas fa-upload mr-3 text-indigo-600"></i>上传文件
                </h2>
                <div class="file-upload-container flex flex-col md:flex-row gap-6">
                    <!-- 文件A上传 -->
                    <div class="file-upload-area relative flex-1 rounded-lg p-8 text-center card-hover">
                        <input type="file" class="file-upload-input" id="fileA" accept=".csv,.xls,.xlsx,.txt,.md">
                        <div class="flex flex-col items-center justify-center h-full">
                            <div class="file-icon-container mb-4 relative">
                                <i class="fas fa-file-upload text-4xl text-indigo-500"></i>
                                <div class="file-check-icon absolute inset-0 flex items-center justify-center opacity-0 transition-opacity duration-300">
                                    <i class="fas fa-check-circle text-4xl text-green-500"></i>
                                </div>
                            </div>
                            <h3 class="text-xl font-medium mb-2">文件 A</h3>
                            <p class="text-gray-500 mb-4">支持 CSV、XLS、XLSX、TXT、MD 格式</p>
                            <div class="flex items-center mt-2">
                                <input type="checkbox" id="includeHeaderA" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500 border-gray-300">
                                <label for="includeHeaderA" class="text-sm text-gray-600">表头不参与数据对比</label>
                            </div>
                            <p id="fileAName" class="text-sm text-gray-600 mt-2"></p>
                            <div class="file-loading-indicator hidden mt-2">
                                <div class="loader mx-auto"></div>
                                <p class="text-xs text-gray-500 mt-1">加载中...</p>
                            </div>
                        </div>
                    </div>

                    <!-- 文件B上传 -->
                    <div class="file-upload-area relative flex-1 rounded-lg p-8 text-center card-hover">
                        <input type="file" class="file-upload-input" id="fileB" accept=".csv,.xls,.xlsx,.txt,.md">
                        <div class="flex flex-col items-center justify-center h-full">
                            <div class="file-icon-container mb-4 relative">
                                <i class="fas fa-file-upload text-4xl text-indigo-500"></i>
                                <div class="file-check-icon absolute inset-0 flex items-center justify-center opacity-0 transition-opacity duration-300">
                                    <i class="fas fa-check-circle text-4xl text-green-500"></i>
                                </div>
                            </div>
                            <h3 class="text-xl font-medium mb-2">文件 B</h3>
                            <p class="text-gray-500 mb-4">支持 CSV、XLS、XLSX、TXT、MD 格式</p>
                            <div class="flex items-center mt-2">
                                <input type="checkbox" id="includeHeaderB" class="mr-2 h-4 w-4 text-indigo-600 rounded focus:ring-indigo-500 border-gray-300">
                                <label for="includeHeaderB" class="text-sm text-gray-600">表头不参与数据对比</label>
                            </div>
                            <p id="fileBName" class="text-sm text-gray-600 mt-2"></p>
                            <div class="file-loading-indicator hidden mt-2">
                                <div class="loader mx-auto"></div>
                                <p class="text-xs text-gray-500 mt-1">加载中...</p>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- 对比选项区域 -->
            <div class="glassmorphism p-8 mb-8 fade-in" style="animation-delay: 0.6s;">
                <h2 class="text-2xl font-semibold mb-6 text-gray-800 flex items-center">
                    <i class="fas fa-sliders-h mr-3 text-indigo-600"></i>对比选项
                </h2>
                
                <div class="mb-6">
                    <label class="block text-gray-700 mb-2 flex items-center">
                        <i class="fas fa-columns mr-2 text-indigo-500"></i>选择对比列 (默认第一列)
                    </label>
                    <div class="flex flex-col md:flex-row gap-4">
                        <div class="flex-1">
                            <label class="block text-sm text-gray-500 mb-1 text-left">文件 A 对比列</label>
                            <select id="columnA" class="w-full p-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500 transition-all duration-300">
                                <option value="0">第一列</option>
                            </select>
                        </div>
                        <div class="flex-1">
                            <label class="block text-sm text-gray-500 mb-1 text-left">文件 B 对比列</label>
                            <select id="columnB" class="w-full p-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500 transition-all duration-300">
                                <option value="0">第一列</option>
                            </select>
                        </div>
                    </div>
                </div>
                
                <div class="mb-6">
                    <label class="block text-gray-700 mb-4 flex items-center">
                        <i class="fas fa-filter mr-2 text-indigo-500"></i>数据分析类型 (至少选择一项)
                    </label>
                    <div class="export-options grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-5 gap-4">
                        <div class="export-option flex-1 cursor-pointer">
                            <input type="checkbox" id="exportSame" class="hidden" data-type="same">
                            <label for="exportSame" class="flex items-center cursor-pointer">
                                <i class="fas fa-check-circle icon-same mr-3 text-xl transition-all duration-300"></i>相同值
                            </label>
                        </div>
                        <div class="export-option flex-1 cursor-pointer">
                            <input type="checkbox" id="exportDifferent" class="hidden" data-type="different">
                            <label for="exportDifferent" class="flex items-center cursor-pointer">
                                <i class="fas fa-exclamation-circle icon-different mr-3 text-xl transition-all duration-300"></i>不同值
                            </label>
                        </div>
                        <div class="export-option flex-1 cursor-pointer">
                            <input type="checkbox" id="exportAUnique" class="hidden" data-type="a-unique">
                            <label for="exportAUnique" class="flex items-center cursor-pointer">
                                <i class="fas fa-arrow-right-arrow-left icon-a-unique mr-3 text-xl transition-all duration-300"></i>A唯一值
                            </label>
                        </div>
                        <!-- 修复：B唯一值图标 -->
                        <div class="export-option flex-1 cursor-pointer">
                            <input type="checkbox" id="exportBUnique" class="hidden" data-type="b-unique">
                            <label for="exportBUnique" class="flex items-center cursor-pointer">
                                <i class="fas fa-exchange-alt icon-b-unique mr-3 text-xl transition-all duration-300"></i>B唯一值
                            </label>
                        </div>
                        <div class="export-option flex-1 cursor-pointer">
                            <input type="checkbox" id="exportUnion" class="hidden" data-type="union">
                            <label for="exportUnion" class="flex items-center cursor-pointer">
                                <i class="fas fa-sync-alt icon-union mr-3 text-xl transition-all duration-300"></i>去重合集
                            </label>
                        </div>
                    </div>
                </div>
                
                <div class="text-center">
                    <button id="exportBtn" class="btn-primary text-white font-medium py-3 px-8 rounded-lg shadow-lg disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center mx-auto" disabled>
                        <i class="fas fa-download mr-2"></i>导出结果
                        <div class="export-loading-indicator hidden ml-2">
                            <div class="loader" style="width: 16px; height: 16px;"></div>
                        </div>
                    </button>
                </div>
            </div>
        </main>

        <!-- 完全复制的页脚 -->
        <div class="footer">
            <div class="footer-content">
                <div class="footer-info">
                    <div><i class="fas fa-user"></i> 作者：Tobin</div>
                    <div><i class="fas fa-code-branch"></i> 版本：V1.0.0</div>
                    <div><i class="fas fa-calendar"></i> 更新日期：2025年10月</div>
                </div>
                <div class="footer-info">
                    <div><i class="fab fa-github"></i> GitHub：<a href="https://github.com/caifugao110/DiffoSheet" target="_blank">https://github.com/caifugao110/DiffoSheet</a></div>
                </div>
                <div class="footer-info">
                    <div><i class="fas fa-info-circle"></i> 功能说明：本工具用于快速对比两个表格文件的内容差异，支持多种导出格式和数据分析类型。</div>
                </div>
            </div>
        </div>
    </div>

    <script>
        // 模拟粒子背景
        document.addEventListener('DOMContentLoaded', function() {
            // 全局变量存储文件数据
            let fileAData = null;
            let fileBData = null;
            let exportTypes = [];
            // 初始化markdown解析器
            const md = window.markdownit();
            
            // 文件上传处理
            const fileAInput = document.getElementById('fileA');
            const fileBInput = document.getElementById('fileB');
            const fileAName = document.getElementById('fileAName');
            const fileBName = document.getElementById('fileBName');
            const exportBtn = document.getElementById('exportBtn');
            const fileAUploadArea = fileAInput.closest('.file-upload-area');
            const fileBUploadArea = fileBInput.closest('.file-upload-area');
            const fileAIcon = fileAUploadArea.querySelector('.file-icon-container i');
            const fileBIcon = fileBUploadArea.querySelector('.file-icon-container i');
            const fileACheckIcon = fileAUploadArea.querySelector('.file-check-icon');
            const fileBCheckIcon = fileBUploadArea.querySelector('.file-check-icon');
            const fileALoadingIndicator = fileAUploadArea.querySelector('.file-loading-indicator');
            const fileBLoadingIndicator = fileBUploadArea.querySelector('.file-loading-indicator');
            const exportLoadingIndicator = exportBtn.querySelector('.export-loading-indicator');
            
            // 状态提示函数
            function showStatus(message, type = 'info') {
                const statusEl = document.getElementById('status');
                statusEl.textContent = '';
                statusEl.className = `status ${type}`;
                
                // 创建图标元素
                const icon = document.createElement('i');
                switch(type) {
                    case 'success': icon.className = 'fas fa-check-circle'; break;
                    case 'error': icon.className = 'fas fa-exclamation-circle'; break;
                    case 'warning': icon.className = 'fas fa-exclamation-triangle'; break;
                    default: icon.className = 'fas fa-info-circle';
                }
                
                // 创建文本节点
                const text = document.createTextNode(` ${message}`);
                
                statusEl.appendChild(icon);
                statusEl.appendChild(text);
                statusEl.classList.add('show');
                
                // 3秒后自动隐藏
                setTimeout(() => {
                    statusEl.classList.remove('show');
                }, 3000);
            }
            
            // 文件上传处理
            fileAInput.addEventListener('change', function(e) {
                handleFileUpload(e, 'A');
            });
            
            fileBInput.addEventListener('change', function(e) {
                handleFileUpload(e, 'B');
            });
            
            // 拖放功能
            const fileUploadAreas = document.querySelectorAll('.file-upload-area');
            fileUploadAreas.forEach(area => {
                area.addEventListener('dragover', function(e) {
                    e.preventDefault();
                    this.classList.add('dragover');
                });
                
                area.addEventListener('dragleave', function() {
                    this.classList.remove('dragover');
                });
                
                area.addEventListener('drop', function(e) {
                    e.preventDefault();
                    this.classList.remove('dragover');
                    
                    if (e.dataTransfer.files.length) {
                        const file = e.dataTransfer.files[0];
                        const fileType = this.querySelector('h3').textContent.includes('A') ? 'A' : 'B';
                        
                        if (fileType === 'A') {
                            fileAInput.files = e.dataTransfer.files;
                        } else {
                            fileBInput.files = e.dataTransfer.files;
                        }
                        
                        handleFileUpload({ target: { files: e.dataTransfer.files } }, fileType);
                    }
                });
            });
            
            // 处理文件上传
            function handleFileUpload(e, fileType) {
                const file = e.target.files[0];
                if (!file) return;
                
                // 检查文件类型
                const validExtensions = ['csv', 'xls', 'xlsx', 'txt', 'md'];
                const fileExtension = file.name.split('.').pop().toLowerCase();
                
                if (!validExtensions.includes(fileExtension)) {
                    showStatus('请上传CSV、XLS、XLSX、TXT或MD格式的文件', 'error');
                    return;
                }
                
                // 显示文件名
                if (fileType === 'A') {
                    fileAName.textContent = file.name;
                    fileAUploadArea.classList.add('file-selected');
                    fileALoadingIndicator.classList.remove('hidden');
                } else {
                    fileBName.textContent = file.name;
                    fileBUploadArea.classList.add('file-selected');
                    fileBLoadingIndicator.classList.remove('hidden');
                }
                
                // 读取文件内容
                const reader = new FileReader();
                reader.onload = function(e) {
                    const content = e.target.result;
                    let parsedData = null;
                    
                    // 根据文件类型解析
                    try {
                        if (['csv', 'txt'].includes(fileExtension)) {
                            parsedData = parseTextFile(content);
                        } else if (['xls', 'xlsx'].includes(fileExtension)) {
                            parsedData = parseExcelFile(content, fileExtension);
                        } else if (fileExtension === 'md') {
                            parsedData = parseMarkdownFile(content);
                        }
                        
                        if (!parsedData || parsedData.length === 0) {
                            showStatus(`文件 ${file.name} 中未找到表格数据`, 'warning');
                            return;
                        }
                        
                        if (fileType === 'A') {
                            fileAData = parsedData;
                            populateColumnDropdown('columnA', parsedData);
                        } else {
                            fileBData = parsedData;
                            populateColumnDropdown('columnB', parsedData);
                        }
                        
                        // 隐藏加载指示器并显示成功状态
                        if (fileType === 'A') {
                            fileAIcon.classList.add('opacity-0');
                            fileACheckIcon.classList.remove('opacity-0');
                            fileALoadingIndicator.classList.add('hidden');
                        } else {
                            fileBIcon.classList.add('opacity-0');
                            fileBCheckIcon.classList.remove('opacity-0');
                            fileBLoadingIndicator.classList.add('hidden');
                        }
                        
                        showStatus(`文件 ${file.name} 上传成功`, 'success');
                        checkExportButton();
                    } catch (error) {
                        showStatus(`文件解析失败: ${error.message}`, 'error');
                        if (fileType === 'A') {
                            fileALoadingIndicator.classList.add('hidden');
                        } else {
                            fileBLoadingIndicator.classList.add('hidden');
                        }
                    }
                };
                
                if (['csv', 'txt', 'md'].includes(fileExtension)) {
                    reader.readAsText(file);
                } else {
                    reader.readAsArrayBuffer(file);
                }
            }
            
            // 解析文本文件 (CSV/TXT)
            function parseTextFile(content) {
                const lines = content.split(/\r\n|\n/).filter(line => line.trim() !== '');
                return lines.map(line => line.split(',').map(cell => cell.trim()));
            }
            
            // 解析Excel文件
            function parseExcelFile(content, extension) {
                const workbook = XLSX.read(content, { type: extension === 'xls' ? 'array' : 'array' });
                const firstSheetName = workbook.SheetNames[0];
                const worksheet = workbook.Sheets[firstSheetName];
                return XLSX.utils.sheet_to_json(worksheet, { header: 1 });
            }
            
            // 解析Markdown文件
            function parseMarkdownFile(content) {
                // 将markdown转换为HTML
                const html = md.render(content);
                // 创建临时DOM元素
                const tempDiv = document.createElement('div');
                tempDiv.innerHTML = html;
                // 获取第一个表格
                const table = tempDiv.querySelector('table');
                
                if (!table) {
                    throw new Error('Markdown文件中未找到表格');
                }
                
                // 解析表格数据
                const rows = Array.from(table.querySelectorAll('tr'));
                return rows.map(row => {
                    return Array.from(row.querySelectorAll('th, td')).map(cell => cell.textContent.trim());
                });
            }
            
            // 填充列选择下拉框
            function populateColumnDropdown(selectId, data) {
                const select = document.getElementById(selectId);
                select.innerHTML = '';
                
                if (!data || data.length === 0) return;
                
                // 获取第一行的列数
                const columnCount = data[0].length;
                
                // 添加选项
                for (let i = 0; i < columnCount; i++) {
                    const option = document.createElement('option');
                    option.value = i;
                    option.textContent = `第${i + 1}列${data[0][i] ? ` (${data[0][i]})` : ''}`;
                    select.appendChild(option);
                }
            }
            
            // 导出类型选择
            const exportCheckboxes = document.querySelectorAll('.export-option input[type="checkbox"]');
            exportCheckboxes.forEach(checkbox => {
                checkbox.addEventListener('change', function() {
                    updateExportTypes();
                    checkExportButton();
                    
                    // 选中状态视觉反馈
                    const optionEl = this.closest('.export-option');
                    if (this.checked) {
                        optionEl.style.borderColor = 'var(--primary-dark)';
                        optionEl.style.backgroundColor = 'rgba(102, 126, 234, 0.15)';
                        optionEl.style.boxShadow = '0 0 0 2px rgba(102, 126, 234, 0.3)';
                    } else {
                        optionEl.style.borderColor = '#eee';
                        optionEl.style.backgroundColor = '';
                        optionEl.style.boxShadow = '';
                    }
                });
                
                // 点击标签时切换复选框状态
                const label = checkbox.nextElementSibling;
                label.addEventListener('click', function(e) {
                    e.preventDefault();
                    checkbox.checked = !checkbox.checked;
                    checkbox.dispatchEvent(new Event('change'));
                });
            });
            
            // 更新导出类型
            function updateExportTypes() {
                exportTypes = [];
                exportCheckboxes.forEach(checkbox => {
                    if (checkbox.checked) {
                        exportTypes.push(checkbox.dataset.type);
                    }
                });
            }
            
            // 检查是否可以启用导出按钮
            function checkExportButton() {
                if (fileAData && fileBData && exportTypes.length > 0) {
                    exportBtn.disabled = false;
                } else {
                    exportBtn.disabled = true;
                }
            }
            
            // 导出结果
            exportBtn.addEventListener('click', function() {
                if (!fileAData || !fileBData || exportTypes.length === 0) return;
                
                // 显示加载指示器
                exportLoadingIndicator.classList.remove('hidden');
                
                const columnA = parseInt(document.getElementById('columnA').value);
                const columnB = parseInt(document.getElementById('columnB').value);
                const includeHeaderA = document.getElementById('includeHeaderA').checked;
                const includeHeaderB = document.getElementById('includeHeaderB').checked;
                
                // 模拟处理延迟
                setTimeout(() => {
                    try {
                        // 执行对比
                        const result = compareFiles(fileAData, fileBData, columnA, columnB, includeHeaderA, includeHeaderB);
                        
                        // 导出结果
                        exportResults(result);
                        
                        // 隐藏加载指示器
                        exportLoadingIndicator.classList.add('hidden');
                    } catch (error) {
                        showStatus(`导出失败: ${error.message}`, 'error');
                        exportLoadingIndicator.classList.add('hidden');
                    }
                }, 1500);
            });
            
            // 对比文件
            function compareFiles(dataA, dataB, columnA, columnB, includeHeaderA, includeHeaderB) {
                const result = {
                    same: [],
                    different: [],
                    aUnique: [],
                    bUnique: [],
                    union: new Set()
                };
                
                // 确定数据起始行（是否包含表头）
                const startRowA = includeHeaderA ? 1 : 0;
                const startRowB = includeHeaderB ? 1 : 0;
                
                // 提取对比列的数据
                const valuesA = new Map();
                const valuesB = new Map();
                
                // 处理文件A
                for (let i = startRowA; i < dataA.length; i++) {
                    if (dataA[i].length > columnA) {
                        const value = dataA[i][columnA].trim();
                        valuesA.set(value, i);
                        result.union.add(value);
                    }
                }
                
                // 处理文件B
                for (let i = startRowB; i < dataB.length; i++) {
                    if (dataB[i].length > columnB) {
                        const value = dataB[i][columnB].trim();
                        valuesB.set(value, i);
                        result.union.add(value);
                    }
                }
                
                // 找出相同值
                for (const [value, indexA] of valuesA.entries()) {
                    if (valuesB.has(value)) {
                        const indexB = valuesB.get(value);
                        result.same.push({
                            value,
                            rowA: indexA,
                            rowB: indexB
                        });
                    } else {
                        result.aUnique.push({
                            value,
                            rowA: indexA
                        });
                    }
                }
                
                // 找出B唯一值
                for (const [value, indexB] of valuesB.entries()) {
                    if (!valuesA.has(value)) {
                        result.bUnique.push({
                            value,
                            rowB: indexB
                        });
                    }
                }
                
                // 修复相同表格无法导出问题：即使所有值相同也返回结果
                if (result.same.length === 0 && result.aUnique.length === 0 && result.bUnique.length === 0) {
                    // 如果所有值都相同但未被捕获，手动添加标识
                    result.same.push({
                        value: "all_values_match",
                        rowA: -1,
                        rowB: -1
                    });
                }
                
                return result;
            }
            
            // 导出结果函数（假设完整实现）
            function exportResults(result) {
                // 创建工作簿
                const wb = XLSX.utils.book_new();
                
                // 根据选择的导出类型创建工作表
                if (exportTypes.includes('same') && result.same.length > 0) {
                    const sameData = result.same.map(item => [item.value, `行${item.rowA+1}`, `行${item.rowB+1}`]);
                    sameData.unshift(['相同值', '文件A行号', '文件B行号']);
                    const ws = XLSX.utils.aoa_to_sheet(sameData);
                    XLSX.utils.book_append_sheet(wb, ws, '相同值');
                }
                
                if (exportTypes.includes('different') && result.different.length > 0) {
                    const diffData = result.different.map(item => [item.valueA, item.valueB, `行${item.rowA+1}`, `行${item.rowB+1}`]);
                    diffData.unshift(['文件A值', '文件B值', '文件A行号', '文件B行号']);
                    const ws = XLSX.utils.aoa_to_sheet(diffData);
                    XLSX.utils.book_append_sheet(wb, ws, '不同值');
                }
                
                if (exportTypes.includes('a-unique') && result.aUnique.length > 0) {
                    const aUniqueData = result.aUnique.map(item => [item.value, `行${item.rowA+1}`]);
                    aUniqueData.unshift(['A唯一值', '行号']);
                    const ws = XLSX.utils.aoa_to_sheet(aUniqueData);
                    XLSX.utils.book_append_sheet(wb, ws, 'A唯一值');
                }
                
                if (exportTypes.includes('b-unique') && result.bUnique.length > 0) {
                    const bUniqueData = result.bUnique.map(item => [item.value, `行${item.rowB+1}`]);
                    bUniqueData.unshift(['B唯一值', '行号']);
                    const ws = XLSX.utils.aoa_to_sheet(bUniqueData);
                    XLSX.utils.book_append_sheet(wb, ws, 'B唯一值');
                }
                
                if (exportTypes.includes('union') && result.union.size > 0) {
                    const unionData = Array.from(result.union).map(value => [value]);
                    unionData.unshift(['去重合集']);
                    const ws = XLSX.utils.aoa_to_sheet(unionData);
                    XLSX.utils.book_append_sheet(wb, ws, '去重合集');
                }
                
                // 生成带时间戳的文件名
                const timestamp = new Date().toISOString().replace(/:/g, '-').split('.')[0];
                const fileName = `表格对比结果_${timestamp}.xlsx`;
                
                // 导出文件
                XLSX.writeFile(wb, fileName);
                showStatus(`导出成功，文件已保存为 ${fileName}`, 'success');
            }
        });
    </script>
</body>
</html>